Iota Lib
HIP 74392; Iota1 Lib; 24 Lib
HIP 74392; Iota1 Lib; 24 Lib
DoubleStar
Lib
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.54
Variable Type
Alpha2 CVn (Magnetic Rotating)
Spectral Type
A0pSi
Star Color
Blue-white
(B-V -0.08)
Distance
108.7 ly
Position & Identifiers
RA
15h 12m 13.3s
Dec
-19° 47' 30.0"
Constellation
Lib
HR
5652
HIP
74392
Bayer
Iota1
Flamsteed
24 Lib
Double Cat
9532
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Visibility
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Multiple Star System
Components
4
Component IDs
AP
Separation
57.7″
Companion Mag
10.9
Position Angle
111°
Star Colors
A: Blue-white
Discoverer
H 6 44
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 57.7″ · PA: 111° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
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Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
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Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
ADS 9532A, Alpha CV?, 4.53 - 4.56V. Spectrum variable.
AP 5.1 B9IV, 5.6 B9V, 23.42y, a = 0.116", combined light, colors. Mean mass 5 solar. BC, 10.5, 11.2v sep. 1.9". A | physical pair in orbital motion about AP at 58"; possibly quintuple system.
ADS 9532A, 22.35y D, K 3.4k/s, V0 -14.2k/s, asini 358.
Member of Pleiades group.
Also classified B8VpSi, B9IV-V; component B G5IV.
Survey Image
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